polydactyly
Học thuậtThân thiện
Definition
Noun: A congenital physical anomaly, specifically a birth defect, characterized by the presence of more than the typical number of digits (fingers or toes) on the hands or feet.
Usage
The term is used in medical, biological, and clinical contexts to describe a specific anatomical variation present from birth. It is a formal and technical term. - The condition can be an isolated finding or associated with certain genetic syndromes. - It is often discussed in terms of diagnosis, surgical correction, and inheritance patterns.
Examples
- Medical Diagnosis:
- Clinical Description:
- Genetic Counseling:
Advanced Usage
- Classification: Polydactyly is often classified by the location of the extra digit:
- Preaxial (Radial): Extra digit on the thumb/big toe side.
- Postaxial (Ulnar): Extra digit on the little finger/little toe side.
- Central: Extra digit between other digits.
- Syndromic Association: The term is used when the condition is part of a broader syndrome, e.g.,
Variants and Related Words
- Polydactyl (adjective): Describing an organism with polydactyly.
- Polydactylism (noun): A less common synonym for polydactyly.
- Hexadactyly (noun): A specific type of polydactyly involving exactly six digits.
- Syndactyly (noun): A different congenital condition characterized by fused or webbed digits, often contrasted with polydactyly.
Synonyms
- Hyperdactyly (noun): A synonymous medical term.
- Supernumerary digit(s) (noun phrase): A descriptive term for the extra finger(s) or toe(s) themselves.
Related Phrases / Collocations
- Surgical correction of polydactyly: Refers to the operation to remove an extra digit.
- Isolated polydactyly: Polydactyly occurring without other associated anomalies or syndromes.
- Familial polydactyly: Polydactyly that runs in a family.
Noun
- birth defect characterized by the presence of more than the normal number of fingers or toes